Influence of impact angles on penetration rates of CRAs exposed to a high velocity multiphase flow

Joachim Haberl, Gregor Mori, Markus Oberndorfer, Wolfgang Havlik, Peter Hosemann, Marilyn Hawley, J. Gregory Swadener

Research output: Chapter in Book/Published conference outputConference publication

Abstract

A combined flow loop - jet impingement pilot plant has been used to determine mass loss rates in a mixed gas - saltwater - sand multiphase flow at impact velocities up to 70 m/s. Artificial brine with a salt content of 27 g/1 was used as liquid phase. Sand content, with grain size below 150 µ, was 2.7 g/l brine. CO at a pressure of 15 bar was used as gas phase. The impact angle between jet stream (nozzle) and sample surface was varied between 30 and 90°. Rectangular stainless steel disc samples with a size of 20 × 15 × 5 mm were used. They were mechanically ground and polished prior to testing. Damaged surfaces of specimens exposed to the high velocity multiphase flow were investigated by stereo microscopy, scanning electron microscopy (SEM) and an optical device for 3D surface measurements. Furthermore, samples were investigated by applying atomic force microscopy (AFM), magnetic force microscopy (MFM) and nanoindentation. Influence of impact velocity and impact angle on penetration rates (mass loss rates) of two CRAs (UNS S30400 and N08028) are presented. Moreover effects of chemical composition and mechanical properties are critically discussed.
Original languageEnglish
Title of host publicationCorrosion conference and expo
Subtitle of host publicationcorrosion 2008
PublisherNACE International
Pages733-752
Number of pages10
Volume2
ISBN (Print)978-1-60560-981-2
Publication statusPublished - 1 Jan 2008
EventCorrosion 2008 - New Orleans, LA, United States
Duration: 16 Mar 200820 Mar 2008

Publication series

NameInternational corrosion conference series
PublisherNational Association of Corrosion Engineers
ISSN (Print)0361-4409

Conference

ConferenceCorrosion 2008
CountryUnited States
CityNew Orleans, LA
Period16/03/0820/03/08

Keywords

  • erosion corrosion
  • impact angle
  • multiphase flow
  • stainless steel

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